A structure for forming a vertically orientated wall comprises a flexible front panel having a longitudinal axis, a transverse axis and substantially continuous front surface; a flexible rear panel positioned rearwardly and parallel to the front panel; and a plurality of cross members connecting the...http://www.google.com/patents/US7146773?utm_source=gb-gplus-sharePatent US7146773 - Concrete accepting wall structure with adjustable curvature
